1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Harrizon [31]
3 years ago
5

Which description accurately describes the cell membrane?

Biology
1 answer:
Alex Ar [27]3 years ago
4 0

Answer:

b. a semi-permeable double layer of phospholipids that have hydrophilic heads and hydrophobic tails

Explanation:

B is correct as the cell membrane is selectively semi-permeable. It is selectively semi-permeable because this quality allows it to control what can and can't enter the cell, and how it does so.

The cell membrane also has a phospholipid bi-layer comprised of a double layer of phospholipids which have hydrophilic head and hydrophobic tails. This is because the heads are made of phosphate and are polar and are therefore attracted to water (hydrophilic), while the tails are made of lipids (i.e. fats, oils) which do not mix with water and are therefore hydrophobic.

The properties of each phospholipid is also why they form the double layer structure, the hydrophilic heads naturally face outwards into the water and protect the hydrophobic tails on the inside.

Hope this helped!

You might be interested in
"They will be able to better understand how, exactly, the creature is able to adapt so well to different environments" Expand on
Vikentia [17]

Answer:

Please see below

Explanation:

Adapting to the surrounding environment is a critical part of surviving and, eventually, evolution. Take mice as an instance. Their coat color plays a major role in allowing to go undetected from potential predators if they are able to blend in well with the surrounding environment. Mice with a coat color that makes them stand out will be easily preyed on. Hence, those who have <u><em>adapted</em></u> to their environmental conditions will live to pass on their genes. This phenomenon is known as selection pressure.

6 0
3 years ago
Please help ASAP please, I can't answer these questions please help
Soloha48 [4]

Answer: Sea walnuts are marine invertebrates. They belong to the genus Mnemiopsis.

Explanation:

These animals have stinging tentacles like jelly fish and they often cast up or come to the sea shores where if they come in contact with humans can harm them by stinging.

The barrier if kept along the side of the sea shore and not allowing humans to reach to the shore can help in preventing the harm from these animals. The introduction of the predatory animals in the sea can also help in reducing their population.

The three benefits for removing the sea walnut:

1. The population of other species will increase as sea walnut is an invasive species.

2. The balance of the marine ecosystem can be maintained.

3. Humans can be protected from the harm caused by these animals.

8 0
3 years ago
How does phloem differ from xylem?
Pani-rosa [81]

Phloem is the food conducting tissue that has a two-way flow.

Explanation:

Plants prepare food on their own and plants also have conductive cells that carry out transportation process. Plants are divided into two types based on their conductive system i.) vascular plants  ii.) non vascular plants.

Vascular plants are those plants which have special conductive cells called phloem and xylem.

Xylem transports water from roots of the plants to other parts of plants and also provides mechanical support to plant. It is uni-directional.

Phloem is the food conducting tissue that transports food to plant and also have bi-directional movement.

7 0
3 years ago
Why does adenine always pair with thymine and guanine always pair with cytosine? What two factors determine the base pairing rul
Mice21 [21]

certain hydrogen bonds are formed so that A goes with T and G with C

4 0
3 years ago
Read 2 more answers
In squirrels, there are 3 potential phenotypes: Black, White, and Gray. A Gray squirrel is crossed with another Gray squirrel. W
docker41 [41]

Answer:

Explanation:

A gray squirrel can either have the same alllele GG or have two different allele Gg this will determine the percentage of the offspring that will be Grey.

For 2 parent with same allele

GG × GG

!

GG GG GG GG

all are grey 100%

For 2 parents with different allele

Gg × Gg

!

GG Gg Gg gg

75% will be grey

25% other color

8 0
3 years ago
Other questions:
  • Biologists have classified broader groups of life forms into super kingdoms that are known as what
    14·1 answer
  • The most common site of back pain is the __________ area. question 15 options:
    11·1 answer
  • Activity 7.1 what controls the movement of materials into and out of the cell
    9·1 answer
  • Explain the process of buffering that occurs in oceans.
    5·2 answers
  • Which of the following describes a type of bacteria that is pathogenic?
    12·1 answer
  • Which is a structure that directs the cell's activities? nucleus Golgi apparatus ribosome mitochondrion
    11·2 answers
  • New biology question pls help
    12·1 answer
  • What happens during asexual reproduction?
    9·1 answer
  • At 21 days into development, the cells are the shape of a flat disk but will fold into a ____.
    12·1 answer
  • Endorsements by celebrities
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!